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Ethyl Glucuronide (EtG) is a unique biological metabolite that is formed in the body after the consumption of ethanol, typically from drinking alcoholic beverages. Reported to be detectable in urine typically from 8-80 hours after ingestion, and 2-36 hours in blood EtG is detectable over a period roughly 5-6 times longer than traditional urine ethanol testing Detectable in oral fluid only a few hours longer than ethanol* EtG has also been isolated in hair follicles *G.Heiseth, B. Yttredal, et.al. ; JATox: July 2010
EtG has become a reliable indicator of alcohol consumption as the metabolite can be found in urine for up to five days after drinking.he test has been challenged when low levels of EtG are found in urine. Whether a regular or occasional drinker, testing requirements may ask for higher cutoff levels of the metabolite (perhaps 500 ng/ml as opposed to 100) to get around claims of incidental exposure versus drinking outright.